Sponsored Content
Top Forums Shell Programming and Scripting How to insert a '#' in the first position of all the files? Post 302842801 by anand787 on Saturday 10th of August 2013 11:48:23 AM
Old 08-10-2013
Reference How to insert a '#' in the first position of all the files?

Hi All,

how to insert a '#' in the first position of all the files based on a certain condition.

I tried this:

Code:
cat /bin/user/input_file.txt | while read a 
do
b=`sed 's/.*song=good.*/\#&/g' $a `
echo $b > /bin/user/new/output_file.txt
done

input_file.txt has list of names of 10 files.. the sed condition will check all the files and search for the condition (song=good) and then inserts a # and then redirects the output to a new directory and a new file output_file.txt..

when i ran this,i am not able to get the desired output.

required output:

file 1:
Code:
1.elvis presly 1,5,6,song=bad;
#2.richie,2,6,8,song=good;
3.benaud,3,9,8,song=bad;

output which i am getting:

Code:
1.elvis presly 1,5,6,song=bad; #2.richie,2,6,8,song=good; 3.benaud,3,9,8,song=bad;

please help me on this

Last edited by Don Cragun; 08-10-2013 at 11:22 PM.. Reason: Add CODE and ICODE tags.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to insert strings at certain position

Hi, I need to insert strings "0000 00" at the each line within the file. The postion is 37 to 42. ex. name1 name2 0000 00 nam name 0000 00 The "0000 00" in two lines should be lined up. I don't know why it's not lined up when I posted it. Can anyone help? (14 Replies)
Discussion started by: whatisthis
14 Replies

2. HP-UX

find the position in a file and insert the data there

Hi, I have a EDI data file ARROWTEST of size 18246 characters. And I want to insert some data after 4200 position in the file. How I can find the position 4200 in that file....Please advise. Regards, (5 Replies)
Discussion started by: isingh786
5 Replies

3. Shell Programming and Scripting

How to insert at a particular position in flat file

Hi All, I have a flat file with ~ as de-limiter (e.g: aaa~ba a~caa~0~d~e) What I want is check if the 4th character is 0 and replace it with say 4. So now it becomes : aaa~ba a~caa~4~d~e. I have to do this for the whole file, but the delimiter position remains the same, not the... (10 Replies)
Discussion started by: akdwivedi
10 Replies

4. Shell Programming and Scripting

insert server name in position 1 on each line

Hello, It has been a long time since I have written unix code and I need to insert a variable into the first position of each line in a file. Below is an example of the script and the desired output file Here is my short script server="$(hostname)" df -kg | awk '{print $1, $2, $3, $4,... (3 Replies)
Discussion started by: rlc198842
3 Replies

5. Shell Programming and Scripting

search a line and insert string into specific at position

Hi, guys. I have one question: How can I search for a line with certain string in it and then insert a string into this line? For example: There is a file called shadow, the contents of it are below: ************************** ... yuanz:VIRADxMsadfDF/Q:0:0:50:7:::... (9 Replies)
Discussion started by: daikeyang
9 Replies

6. Shell Programming and Scripting

Insert character in a specific position of a file

Hi, I need to add Pipe (|) at 5th and 18th position of all records a file. How can I do this? I tried to add it at 5th position using the below code. It didnt work. Please help!!! awk '{substr($0,5,1) ~ /|/}{print}' $input_file > $temp_file (1 Reply)
Discussion started by: gpaulose
1 Replies

7. Shell Programming and Scripting

insert character in particular position.

I want to insert space in 7th position of all the lines usign vi editor or sed command Input file 12345689010 abcdefghijk . . Output file 123456 89010 abcdef ghijk . . (7 Replies)
Discussion started by: Jairaj
7 Replies

8. Shell Programming and Scripting

Insert | in specific position

Hi , I have a file which has line similar to below 13123324234234234234234234234234234 3454546456dfhgfhgh454645654asdasfsdsddfgdgdfg 345345345mnmnbmnb346mnb4565464564564645645 Not for each line for specific position I need to insert some '|' Positions are fixed. Like 3,5,9,11 So the... (5 Replies)
Discussion started by: Anupam_Halder
5 Replies

9. UNIX for Dummies Questions & Answers

Using sed to insert at position x and then every interval y for each line

Thanks to help from Don Cragun in post 302924174, I'm off and getting into trouble on my own (finally) with sed. Here is my goal - insert \\r\n at the 60th character on each line and then every 76th character thereafter: Input:... (3 Replies)
Discussion started by: gusbrown
3 Replies

10. UNIX for Beginners Questions & Answers

How to insert a string and variable at specified position in command in bash?

I currently have a loop that reads all .bam files in a directory (wont always be 4 like in this example, into $id. What I am trying to do, unsucessfully, is create specific new lines in an exsisting command using each $id. Each new line would be: --bam ${id} \ Tried p=$dir... (8 Replies)
Discussion started by: cmccabe
8 Replies
Audio::MPD::Common::Item::Song(3pm)			User Contributed Perl Documentation		       Audio::MPD::Common::Item::Song(3pm)

NAME
Audio::MPD::Common::Item::Song - a song object with some audio tags VERSION
version 1.120881 DESCRIPTION
Audio::MPD::Common::Item::Song is more a placeholder with some attributes. Those attributes are taken from the song tags, so some of them can be empty depending on the file. The constructor should only be called by Audio::MPD::Common::Item's constructor. ATTRIBUTES
album Album of the song. (format code: %d) artist Artist of the song. (format code: %a) albumartist Artist of the album. (format code: %A) composer Song composer. (format code: %C) date Last modification date of the song. (format code: %M) disc Disc number of the album. This is a string to allow tags such as "1/2". (format code: %D) file Path to the song. Only attribute which will always be defined. (format code: %f) genre Genre of the song. (format code: %g) id Id of the song in MPD's database. (format code: %i) last_modified Last time the song was modified. (format code: %m) name Name of the song (for http streams). (format code: %N) performer Song performer. (format code: %P) pos Position of the song in the playlist. (format code: %p) title Title of the song. (format code: %t) track Track number of the song. (format code: %n) time Length of the song in seconds. (format code: %l) METHODS
as_string my $str = $song->as_string( [$format] ); Return a string representing $song. If $format is specified, use it to format the string. Otherwise, the string returned will be: either "album = track = artist = title" or "artist = title" or "title" or "file" (in this order), depending on the existing tags of the song. The last possibility always exist of course, since it's a path. This method is also used to automatically stringify the $song. WARNING: the format codes are not yet definitive and may be subject to change! AUTHOR
Jerome Quelin COPYRIGHT AND LICENSE
This software is copyright (c) 2007 by Jerome Quelin. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.14.2 2012-04-01 Audio::MPD::Common::Item::Song(3pm)
All times are GMT -4. The time now is 12:52 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy